I have recently build a platform above my house at y=250. As my house is at ground level, I would prefer not to have to build a tower every time I wish to get up there, and ideally I would like to not have a tower visible between the platform and my house.
With this in mind, I decided that nether portals would be the way to go. I have a nether portal in my house at y=57 and one on my platform at y=250, I also have portals in the same places at y=70 and y=115 in the nether.
Unfortunately, the portal at y=155 in the nether sends me back to the portal in my house. I understand that this is because the house portal is closer. Is there any possible way for me to travel to my platform using nether portals? Or failing that, any way to travel there without building something between my house and the platform?